Incubator.



H. W. LUHMANN. INGUBATOR.- APPLICATION FILED JUNE 21, 1911.

1,035,885 PatentedAug. 20, 1912 abhauen? HENRY.W."^LUHMANN, OF SAN JOSE, CALIFORNIA.

iNoUi'mron.

Specification offLetters Patent;

Application ined' June 21,4911. .seran no. 634,407.

Be itknown that 1,;HENRY VLLUHMANN, laI-sul'ijectxof' the Emperor ofGerinany, rel

sidinga-tf-San-'g-Jose, in the'. county of. Santa Claraand State' 'of California,-have invented new and useful "Improvementsin Incubators, "of Awhich fthefollowing `iis aspeci-i.

iication. p A This invention isian incubator, and my object "is to so construct the same :that: the hot. air passes Vover the 4egg chambers while the warm air asses into their upper portions. and deseen s thereinthrough the egg trays and nurseries, .whence it finally "passes into` an outer'u' right tine and to the exhaust.

Thisand. otherobjects' are accomplished byl the construction described below 'and' shown the drawinv whereinn Figure 1 is a centrziil longitudinal sectional view of this machine, partly in elevation toward the-left end ofthe view. Fig. 2 is a 1an View on th'ebroken line 2-2 of Fig. l. ig.- 3 is a perspective detail showing a portion of one of the egg trays.

In the .drawings thenunieral 1 designates legs supporting the body,.which1`atter has double` upright end walls 2 and 3, forming an outlet iue 4 between. them leading to an 'exhaust 5through the outer wall 2 near its top. The-top of thebody `comprises a re-` movable cover'- which may be of wood, next beneath' it -a metal plate 7 spaced some distance .from the cover so as to leave a dead air space between them, and next. beneath the plate aiiat and shallow heater tank 8 through which the section line 2-2 cutsl at the left end of. Fig. 1 and which is therefore showninteriorly in Fig. 2. lVithin this tank are two transverse battles 9'which extend nearly across it as shown in the last named View, one near the exhaust 5 and the other near. the inlet which rises through the center of the body as will presently herexplained. The bottoni 10 of said body is by preference a solid board, pierced at its center with ahole 7 for -the passage upward therethrough of two concentric tubes. The

innermost of these, numbered 12, is for hot air, and its lower end has a flaring mouth 13 standing over a lamp 14: whose font 15 rests oula shelf 1G' supported by hangers 1T from the bottom 10 as shown. The font is preterably of suiiicien'tsize to contain enough oil for a complete hatching, and therefore .the lamp `and its wiel; needs no attentron throughout the entire period ofv incubation except perhaps that the wiekmniay'have to be from thelamp rises through :its chimney and draws in-eold air through the mouth 13 which v inixens .with* the products of combustion, and the mixture rises througlrthe inner tube 12 and communicates. at the point 18 with the heater tank '.Above this point the tube 12 .continues to andthrough the exhaust- 19 at thecenter of the to' f-the body, which exhaust may be regulat by a damper 20 or other suitable device so to cause more or less of the h ot air to passfoutward through the tanlc'and the lateral 'exhausts 5; An auxiliary exhaust pipelextends parallel to Patented .l1ug.,20, 1912.-

fraised occasionally and trimmed. 'lhe heat the exhaust 19 and has a-daniper 43 eonvnected'to the'damper 20, by means lof .the

damper lever 42, fulciunied as' shown at 45,

land provided with an adjusting weightfl.

The outermost of said concentric tubes, numbered 22, tits through .the hole 11 and surrounds .the innermost tube 12 at some distance therefrom so as to .leave an annular passage between them for warm air which is admitted through the mouth or lower end 23 ofthis outer tube. t either side of this tube 22 anddisposed a little distance from it is. located 'a partition 24 extendinof completely across the interior of the body, and above each partition is a shield 25 extending about half way across', the interior-of. the body so. asto be open at. both ends, and rising nearly -to the top of the body as shown. Plates 26 ,extending completely across the interior of the' body rest upon the upper edges of the shields 25, their outer edges ex tending outward for some distance into the egg' chambers at either side' of said partitions 24, and their inner edges extending inward to points 28 above the upper end of the outer tube 22 with which,.l1o\\ever, theydo not contact.' Finally, outlets 29 are formed through the inner end walls 3 at rather low ,points therein as shown; This causes the cold air drawn in at ,the mouth 23m-if the outermost tube 22 to pass up the saine around the inner tube l2 and become heatedy consid.- erably thereby, then passing out the upper end of this tube 22vat the'point 2S, part of it descends around said tube 22into the nioistening chamber as will be described be low and the balance of the warm air passes over the plates 26 downward through the egg chambers and outward through the out- -lets 29 into 'the outlet lues 4, up which it rises until reaching the exhausts 5 w'lien'it strikes theeggs which lie upon the trays 30 which are mounted upon the cleats 31, and when it is cooler it strikes the young chicks within the nursery drawers 32 which lie upon the bottom of the body. It is to be understood that the front of said body is closed byhinged doors 33, preferably havwith the edges 3 5 of the ing glass panels as usual and provided with buttons or other devices (not shown) so that when the doors are opened the trays and lrawers may be withdrawn at will.

As shown in Fig. 3, each tray has at eacn end a" stationary sect-ion 36 rising a short distance above the .screen bottom, and to which section is hinged a second section 87. These two sections are of such width that when stood upright they are of equal height sides, but when the eggs begin to hatch the hinged section 37 is 'let down as shown in. this view so that the fully hatched chicks can pass over A these two sections 36 and 37 and drop through the space 34 into the nursery drawer below, butx the eggs which have `not hatched or those whlch are inthe process of hatching cannot roll through said space by reason of the presence of the stationary section 36. I consider this an important detail of my invention.

The parallel partitionsl 24; extending across the interior of the body, with the i shields above them although of less length, make what might be called a hallway" across said body intercepted at. the center o-f its length by the upright tubes 12 and 22 as above described, although the larger of these tubes is not suicient in size tc completely. close this passage or hallway. One end of the latter, as the' front. may contain t-he moist-ure pan 40 resting upon cleats 41, and access to this pan may be had through a door hinged in the front of the A body. d The thermostat 41 connected to the damper lever 42 operates the dampers 21 and 43 simultaneously to liberate the heated airwhen the temperature inthe casingrises to a certain point. Access to that end of the hallway may be had through-another hinged door at the r'ear of the body. As the air ascends within the outer tube 22 and passes out of its upper endA at the point 28, some of it passes under -the plate 26 and descends into this hallway and therefore becomes to an extent moistened by reason of the moisture within the pan 40; and, flowing around the ends of the shields 25, itpasses in moistened condition into theegg chambers in e manner which will` be clear. Meanwhile, the air'which passes over the plates 26 and descends through said chambers has not been moistened in this manner. I find this division of the intlowing fresh air extremely beneficial in an incubator of substantially the proportions illustrated. However, it is clear that the size and shape of parts might be amplifiedor altered considerably without departing from the spirit of m invention. There might, in fact, be more t n one egg tray in each chamber, or the chambers could be made relatively larger and two of the liti Til

heatersem'ployed, though I-prefer that the font shall be of sufficient size to supply. all the necessary oil for one hatching.

-What is claimed as new is:

1. An incubatorv whose body has egg chambers at its ends and a' transverse hallway between them formed by parallel par-A titions, shields superimposed upon the partitions and extending partway across the body and rising nearly to its top, a heater tube rising through the center of the'lengthof` said hallway, a heater tank in communication therewith and extending across the tops 'of the egg chambers, al -moistening pan in one end of 'said hallway', and means for admitting fresh air around lsaid-tube to the hallway and moistening it and then passing it around the ends of said shields into the` egg chambers.

2. An incubator whose body has egg chambers at its ends and a transverse hallway between them formed by parallel par-v titions, shields superimposed uponthe partit-ions and extending partwayacross the body and ris-ingnearly to-its top, a heater tube rising through the center of the length of said hallway, a heater tank in communication therewith and extending across the tops of the egg chambers, a moistening panv in one end of said hallway, means for ad# mitting fresh air around said tube to the4 hallway and moistening it and then passing it around the ends of said shields into the egg chambers andover the upper edges vthereof beneath said tank, plates extending completely across said upper edges,'and double end body-walls forming an airspace between them, the innermost having perforations near its bot'- tom for air outlets and the'outermosthaving exhausts near the top of the body.

the body and resting upon In testimony whereof I-aftix my signature` in presence of two witnesses.

HENRY 'W. LUI-IMAfNNt l: i

"Witnesses:

DE LANCEY Lewis, BLANCHE FULLAGAR.' 

